QSerialport, cannot open pseudo terminal device port

Cat_

Hi there! I am playing with QtSerialport on Fedora 26, and since I don't have a real device to try,
I created two serial ports using nullmodem then to simulate a communication I used minicom on one side, and screen on the other.
So the connection has been setted up between /dev/pts/4 and /dev/pts/5 aka /tmp/loop0 and /tmp/loop1. I am trying to open a port with the following code, but the bool control variable I putted there, returns me false, so it looks like the Qt program is not able to open such device.

QSerialPort port("/dev/pts/4");
bool isOpened = port.open(QIODevice::ReadOnly);
qWarning() << isOpened;

Could the problem be that I have already an opened connection active between /dev/pts/4 and /dev/pts/5? I tried with /dev/pts/3 and it returns true, so I could be right.

update
I tried to append

qWarning() << "available ports: " << QSerialPortInfo::availablePorts().size();

But it returns available ports: 0

UPDATE 2
pts are not serial ports. Source: https://stackoverflow.com/questions/32572400/qt-and-virtual-serial-ports

kuzulis

use tty0tty, as it is "true" virtual serial ports